So I applied for my u visa March 3/28/17 and I did my biometrics 519/17. Does anyone know when I would get my workers permit? And when I would receive a decision on my visa?

I'm from September 2017. After going through many posts and doing the research, you'll be getting the DA decision somewhere in the ball park of end of 2020 or early 2021. And yes.. with current 10k annual cap, it will eventually cause the massive backlog of waiting up to 10+ years just to get DA decision. Your work permit follows after DA decision. We've got a long way to go my friend..